180 



ULVA— tJVULARlA. 



f. Flowers appear before the leaves, a mag- 

 nificent tree. 



fuV'va, (slippery-elm, M. Ap. "^ .) branch- 

 es scabrous, white ; leaves ovate-oblong ; 

 veiy acuminate, pubescent on both sides ; 

 buds tomentose, with a thick ta-w'ny ■wool ; 

 flc^wers sessile, smaller than the white-elm ; 

 leaves larger; stamens often 7. The mu-' 

 cilage of the inner bark medicinal. 



nemoraV'ts, (river-elm, Ap. ^ .) leaves ob- 

 long, somewhat glabrous, equally serrate, 

 nearly equal at base ; flowers sessile. 



racemo'sa, ( ^.) flowers in racemes ; pedi- 

 cels in distinct fascicles united at their ba- 

 ses ; leaves ovate, acuminate, auriculate on 

 one side, doubly serrate, glabrous above, 

 minutely pubescent beneath ; stamens 7-10 ; 

 stigmas 2, recurved. 



ola'ta, (whahoo, Mar. '^.) branches on 

 each side winged with a cork like bark , 

 leaves nearly sessile, oblong-oval, acute, 

 doubly serrate, nearly equal at base ; fruit 

 pubescent, ciliate. 30 f. S. 



UL"VA. 21—4. {Algce.) 



Uii"za, frond lance-linear ; margin undu- 

 late-crisped ; about an inch broad, tapering 

 at the base, green. Seashore. 



URASPER"MUM. 5—2. (UmbellifercB.) [From 



oura, a tail, and sperma, seed.'i 



clay to' 111, (sweet cicely, J. 2_f-) leaves 

 compound, hairy ; leafets gash-toothed ; um- 

 bels axillary and terminal, about 5-rayed ; 

 style as long as the villose germ, filiform, 

 reflexed. 2 f. 



URE'DO. 21—6. (Fungi.) [From uro, to burn, 



on account of its burnt color.] 



linea'ns, (yellow grain-rust, J, @.) linear, 

 very long, stained yellow, at length but ob- 

 scurely colored. On the culms and leaves 

 of barley, oats, rye, wheat, &c. 



UR"TICA. 19—4. (Urticea.) iFr om urendo, 



burning ; on account of the sensation it 



causes.] 



dio'ica, (common nettle, J. 14..) leaves 

 opposite, cordate, lance-ovate, coarsely ser- 

 rate ; fiov/ers dioecious ; spikes panicled, 

 glomerate in pairs, longer than the petioles. 

 2-3 f. 



pn'mila, (rich-weed, Ju. @.) leaves op- 

 posite, ovate, acuminate, 3-nerved, serrate ; 

 lower petioles as long as the leaves ; flow- 

 ers moncEcious, triandrous, in clustered 

 corymbs, shorter than the petioles; stem 

 succulent, almost transparent. 6-12 i. Wet 

 grounds. 



v'rens, (stinging nettle, J. ^.) stem his- 

 pid ; leaves opposite, elliptic, about 5-nerv- 

 ed, acutely serrate ; spikes glomerate, in 

 pairs. 12-14 i. 



canaden"$is, (Canada nettle, Ju. 2/.) 

 leaves cordate-ovate, acuminate, hispid on 

 both sides ; panicles axillary, mostly in 

 pairs, divaricately branched ; the lower 

 Btaminate ones longer than the petioles; 

 upper pistiUate ones elongated ; stem his- 

 pid, stinging. 5-fi f. Ya.v. divaricn'tciAe^yes 

 smooth; panicles solitary, spreading. 4 6f. 



chamcedroi'des, (Mar. 0.) stem glabrous ; 

 leaves opposite, sub-sessile, ovate, serrate, 

 Btrigose beneath : clusters of flowers axil- 



lary, ses.sile, sub-globose, reflexed ; prickles 

 stimulant, white. 4-6 i. S. 



rcticula'ta, (r-y.) leaves deep green. A 

 native of Jamaica. 

 US'^NEA. 21—5. (Filices.) 



plica'ta, frond pendulous, smooth, pale 

 bi'anches lax, very branching, sub-nbrous , 

 the extreme ones capillary ; receptacles 

 flat, broad, ciliate ; the liairs very slender 

 and long. On trunks and branches of trees , 

 most common on ^vy, dead limbs of ever- 

 greens, from which it often hangs in long, 

 green locks. 

 UTRICULA'RIA. 2—1. (Scrophularice.) [From 



utriculus, a little bladder.] 



vuIga'Hs, (bladder-wort, y. Au. 2^.) float- 

 ing ; stem submerged, dichotomous ; leaves 

 many-parted, margins bristly ; scape 5-9- 

 flowered ; upper lip of the corolla entire, 

 oroad, ovate ; spur conical, incurved ; flow- 

 ers in racemes. Ponds. 



stria! ta, floating; scape 2-6-flowered, 

 root furni.shed with air-vessels ; corolla large, 

 yellow striate with red ; spur much shorter 

 than the lower lip. 



purpu'rea, scapes axillary, generally 2 or 

 3 inches long ; flowers purple. Ponds on 

 mountains. Mass. to Flor. 



infia'ta, (y. Au. 2-([.) radical leaves ver- 

 ticillate, inflated, pinnatifid at their ex- 

 tremities ; lower lip of the corolla 3-lobed 

 spur deeply emarginate. Ponds. 



stria' ta, (y. J. Lf.) floating; scape 2-6- 

 flowered ; upper lip of the corolla ovate- 

 round, sub-emarginate, margin waved , 

 lower lip 3-lobed, sides reflected ; spur 

 straight, obtuse, shorter than the lower lip. 

 Swamps. 



gib"ba, (y. Ju. 2/.) floating; scape mostly 

 2-flowered ; .spur shorter than the lower 

 lip of the corolla, obtuse, gibbous in the 

 middle. 1-3 1. Ponds. 



cornu'ta, (y. Au. 24!.) scape rooting, erect, 

 rigid; flowers 2-3, sub-ses.sile ; inferior lip 

 of the corolla very wide 3-lobed ; spur very 

 acute, lengthened out longer than the co 

 rolla. 10-12 i. Wet rocks. 



persona'ta, (y. %) scape rooting, many 

 flow^ered ; upper lip of the corolla emargin- 

 ate, reclined ; lower one small, entire, pal- 

 ate large ; spur linear-subulate, acutish. 

 Bogs. 



seta'cea, (y. J. 11) scape rooting, filiform ; 

 upper lip of the corolla ovate, lower one 

 deeply 3-lobed ; spur subulate, entire. 3-6 

 i. Swamps. 



inte'gra, (y. ^.) floating; scape 1-2-flovv- 

 ered ; upper lip of the corolla sub-3-lobed ; 

 lateral lobes sub-involute ; lower lip entire ; 

 spur nearly equalling the lower lip. S. 



bijlo'ra, (y. Ju.) spur subulate, obtuse, 

 about as long as the lower lip; scape about 

 2-flowercd ; leaves setaceous. S. 



UVULA'RIA. 6—1. (LiliacecB.) [From uvula, 

 a membrane of tlie throat, the soreness of 

 which this is supposed to heal.] 

 ptrfolia'ta, (bell- wort, y. M. 11.) leaves 

 perfoliate, oval-obtuse (lance-linear or oval- 

 oblong in the young state) ; corolla bell- 

 liliaceou,?, scabrous or granular within : on 

 ther cuspidate. 8-12 i. 



